How do you convert 3.345 kJ to mJ?

Is that millijoules? Multiply by 1E6.

Is that megajoules? Divide by 1000.

To convert from kilojoules (kJ) to millijoules (mJ), you need to understand the relationship between the two units.

1 kilojoule is equal to 1000 joules (1 kJ = 1000 J), and 1 millijoule is equal to 0.001 joules (1 mJ = 0.001 J).

To convert from kJ to J, multiply the value in kJ by 1000:
3.345 kJ * 1000 = 3345 J

To convert from J to mJ, multiply the value in J by 1000:
3345 J * 1000 = 3,345,000 mJ

Therefore, 3.345 kJ is equal to 3,345,000 mJ.